你当前正在访问 Microsoft Azure Global Edition 技术文档网站。 如果需要访问由世纪互联运营的 Microsoft Azure 中国技术文档网站，请访问 https://docs.azure.cn。
tolong()
Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel
Converts the input value to a long (signed 64-bit) number representation.
Note
When possible, use long literals instead.
Syntax
tolong(value)
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| value | scalar | ✔️ | The value to convert to a long. |
Returns
If conversion is successful, the result is a long number.
If conversion isn't successful, the result is null.
Example
tolong("123") == 123